Demurrage Calculator

No. This is a planning estimate only. Your charter party, bill of lading, port tariff, or container lease agreement defines the actual rates, free time allowance, exceptions, and billing terms. Always refer to your contract for official demurrage calculations.

Demurrage is typically charged while a container sits at a port or terminal beyond free time. Detention is charged when a container is kept outside the port (at a warehouse, customer site) beyond the allowed period. Some shipping lines use the terms interchangeably. This calculator works for either scenario.

Enter numbers in whatever currency your contract specifies (USD, EUR, GBP, etc.). The calculator performs pure arithmetic without currency conversion.

Yes, many shipping lines use tiered rate schedules where the daily rate increases after certain day thresholds (e.g., days 1 to 5 at $100/day, days 6 to 10 at $200/day). This calculator uses a single flat rate. For tiered schedules, calculate each tier separately and sum the results.

Import containers typically get 3 to 7 free days at origin and destination ports. Export containers may get 5 to 10 free days. Free time varies by shipping line, port, and trade lane. Check your booking confirmation for specific free time allowances.

Yes, the Demurrage Calculator is fully embeddable. Tap "Embed" above to configure appearance and copy the code. It is free to use, works on any platform (HTML, WordPress, CMS), and adjusts to any screen size automatically. Visit calculory.com/services/embed-calculators for the complete guide.